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Old 03-11-2021, 07:01 AM   #4
KULTULZ
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Post Re: Dual chamber master cylinder for drum brakes

Quote:
...may want to add a 10# residual in the front(disc take 2#)as some dual drum/disc M/c's have internal residual valves (2# &10#) and would have wrong RPV for front drums
A #2 RPV (Residual Pressure Valve) is used only on a DISC BRAKE CIRCUIT if the MC is located under the front caliper, say a 56 F100. It prevents fluid drain-back from the caliper to the MC at rest leading to a spongy pedal.

If you buy a late replacement MC, it will not likely have #10 RPV(s) installed. You then must plumb in inline RPV's to both circuits..

Quote:
I don't know why a dual M/C for disc in the front wouldn't work if that's all you can find
Differing bore sizes and fluid pressure/volume.
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Last edited by KULTULZ; 03-11-2021 at 08:50 AM. Reason: CRS and Advanced OCD - CDO In Correct Alphabetical Order
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